T/UNP 692-2025 Active Group standards

T/UNP 692-2025 Technical Specifications for Urban Drainage Pipe Detection and Repair

T/UNP 692-2025 Urban Drainage Pipe Inspection and Repair Technical Specification

Publish Date: 2025-05-28 Implement Date: 2025-05-28 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/UNP 692-2025

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Drainage system

Publish Date: 2025-05-28

Implement Date: 2025-05-28

Scope

Main technical content: This standard specifies the general requirements for urban drainage pipeline inspection and repair, pipeline inspection, pipeline repair, safety and environmental protection requirements, and file management, and is applicable to the inspection and repair of urban drainage pipelines. In terms of inspection, it specifies the applicable stages, technical indicators, and operational requirements of inspection methods such as CCTV, sonar, pipe endoscopes (QV), and pipeline radar. For example, CCTV inspection equipment must meet indicators such as a pixel count of ≥2 million, and during inspection, the water level in the pipeline should not exceed 20% of its diameter, and the water depth should not exceed 300mm. In terms of repair, it covers various processes such as flipping-type in-situ curing and UV-light in-situ curing. For flipping-type in-situ curing, it requires controlling the flipping pressure and tracking the temperature during the curing process. In terms of safety and environmental protection, it requires formulating special safety plans, setting up warning signs, and handling solid waste. File management requires organizing and archiving relevant materials in accordance with regulations. This standard helps standardize operations and improve project quality and safety.